It was supposed to be a Mythic card set, but what the heck is this Warhammer 40k?

[Warhammer], [Mythology & Folklore], [Mysterious Dungeons], [Non-Fast-Paced] – Lu Ya, a Warhammer enthusiast, transmigrates to a card game world and becomes an apprentice card maker. Lu Ya initially intends to indulge in the transmigrator's fine tradition of plagiarism, but discovers that the myths and legends he remembers already exist in this world. To survive in this world teeming with monsters and demons, Lu Ya can only set his sights on the golden behemoth on the Golden Throne! Encountering the dungeon "Night Parade of a Hundred Monsters" at the start, Lu Ya decisively chooses to create [The Lamenter] Astartes, thus embarking on a Warhammer card-making path drastically different from others. [Dark Angel], [Grey Knight], [Imperial Guard] – mortals standing shoulder to shoulder with gods! [Imperial Titan], [Terminator], [Imperial Poison Blade] – Imperial technology awes the eye! [Krieg], [Katachan], [Kardia] – a torrent of steel crushing all monsters and demons! Years later, when the evil god descended from the abyss to the mortal realm, attempting to drag the entire world into hell, Lu Ya merely smiled disdainfully: "An evil god? Before the human empire, he's nothing but a loli!" "It's time for everyone here to witness what a true fifth evil god of the subspace is!" With that, the golden giant who had remained silent on the golden throne for millennia slowly rose to his feet! This book is also known as "Warhammer Card Maker," "The Otherworldly Agent of the Golden Throne," and "Who Made Him Make Cards Like This?"...